btrfs: minor whitespace in ctree.h

We've accumulated some whitespace problems in ctree.h, clean these up.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -435,10 +435,8 @@ struct btrfs_file_private {
 	void *filldir_buf;
 };
 
-
 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
 {
-
 	return info->nodesize - sizeof(struct btrfs_header);
 }